EP 3217507 A1 20170913 - SECONDARY CONTROL METHOD AND APPARATUS OF PARALLEL INVERTERS IN MICRO GRID

Title (en)

SECONDARY CONTROL METHOD AND APPARATUS OF PARALLEL INVERTERS IN MICRO GRID

Title (de)

VERFAHREN UND VORRICHTUNG ZUR SEKUNDÄREN STEUERUNG VON PARALLELEN WECHSELRICHTERN IN MIKROGITTERN

Title (fr)

PROCÉDÉ ET APPAREIL DE COMMANDE SECONDAIRE D'ONDULEURS PARALLÈLES DANS UNE MICRO-GRILLE

Publication

EP 3217507 A1 20170913 (EN)

Application

EP 17160092 A 20170309

Priority

CN 201610140985 A 20160311
CN 201710044038 A 20170119

Abstract (en)

The present invention discloses a secondary control method and apparatus of parallel inverters in a micro grid, comprising: generating frequency and amplitude of fundamental voltage in the voltage instruction of inverter by droop control according to output voltage and output current of inverter to obtain a fundamental voltage instruction value; extracting voltage values and current values of a first and second AC signals from output voltage and output current of inverter, generating frequency instruction values of the first and second AC signals by droop control to obtain voltage instruction values of the first and second AC signals; regulating the output voltage of inverter according to the voltage instruction value of the first AC signal, the voltage instruction value of the second AC signal and the fundamental voltage instruction value.

IPC 8 full level

H02J 3/38 (2006.01); H02J 3/46 (2006.01)

CPC (source: EP US)

H02J 3/381 (2013.01 - EP US); H02J 3/46 (2013.01 - EP US); H02M 1/42 (2013.01 - US); H02M 7/537 (2013.01 - US); H02J 2300/10 (2020.01 - EP); Y02P 80/14 (2015.11 - EP US)

Citation (applicant)

CN 104901334 A 20150909 - UNIV XI AN JIAOTONG

Citation (search report)

[X] CN 103001247 B 20140910 - CHINA ELECTRIC POWER RES INST, et al
[X] WO 2013087085 A1 20130620 - FACHHOCHSCHULE SUEDWESTFALEN, et al
[X] CN 104410097 A 20150311 - GUANGDONG EAST POWER CO LTD
[X] EP 2940826 A1 20151104 - KAWASAKI HEAVY IND LTD [JP]
[X] WO 2015075923 A1 20150528 - KAWASAKI HEAVY IND LTD [JP]

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3217507 A1 20170913; EP 3217507 B1 20190717; US 2017264213 A1 20170914; US 9853571 B2 20171226

DOCDB simple family (application)

EP 17160092 A 20170309; US 201715452690 A 20170307